HOWTO resolve Docker port conflicts

[MikeTheCanuck]

Brian Grant observed on 2017-02-03, "As a class we are developing a large base of knowledge when it comes to troubleshooting and running docker in various environments and resolving issues like port conflicts and permissions. These are issues I anticipate coming up in the wild. What are people’s thoughts on the best ways to start documenting some of these procedures and best practices we are developing?"